Galvanized Steel
Structural galvanized steel combines mechanical strength with corrosion protection, making it ideal for long-term outdoor and industrial use.
S280GD and S320GD Galvanized Steel are positioned as mid-range structural grades under EN 10346, offering a balance between strength, durability, and processing efficiency.
The zinc coating applied through hot-dip galvanizing protects the steel substrate from corrosion, extending service life and reducing maintenance requirements.
Strength Efficiency and Material Optimization
Higher yield strength improves material efficiency by reducing steel consumption in structural designs.
| Design Factor | S280GD | S320GD |
|---|---|---|
| Strength-to-weight ratio | Balanced | Improved |
| Thickness reduction potential | Moderate | Higher |
| Structural stiffness | Medium | Medium–High |
| Design safety margin | Wide | Controlled |
S320GD Galvanized Steel allows for lighter structures without compromising safety, particularly in medium-load applications.
Zinc Coating and Corrosion Resistance
Both grades rely on zinc coating thickness rather than base steel strength for corrosion resistance.
| Zinc Coating Option | Typical Environment |
|---|---|
| Z100–Z140 | Indoor or low-corrosion areas |
| Z180–Z275 | Outdoor and industrial exposure |
With the same coating specification, S280GD and S320GD Galvanized Steel offer identical corrosion performance.
Processing and Installation Considerations
From fabrication to installation, processing behavior affects project efficiency.
| Fabrication Aspect | S280GD | S320GD |
|---|---|---|
| Cutting and punching | Easy | Requires control |
| Welding stability | Very good | Good |
| On-site adjustment tolerance | High | Moderate |
S280GD offers more tolerance during installation, while S320GD requires more controlled handling due to its higher strength.
Typical Industry Applications
S280GD and S320GD Galvanized Steel are commonly used in:
- Steel buildings
- Industrial plants
- Infrastructure support systems
- Agricultural facilities
The final selection depends on load requirements, fabrication capability, and cost optimization strategy.
S280GD Galvanized Steel is widely used in:
- Light steel structures
- Roofing and wall cladding systems
- Purlins and secondary framing
S320GD Galvanized Steel is more commonly selected for:
- Medium-load structural members
- Industrial frames
- Applications requiring higher stiffness
GNEE STEEL provides S280GD and S320GD Galvanized Steel in coils, sheets, and customized cut-to-length formats.
With stable production standards and practical application experience, GNEE STEEL helps customers select the most suitable structural galvanized steel for long-term performance and cost efficiency.
Available Steel Grade
|
Standard |
Grade |
C |
Si |
Mn |
P |
S |
Ti |
|
Forcold Forming Chinese Standard |
DX51D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
DX52D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX53D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX54D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX56D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX57D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
Forcold Forming Japanese Standard |
SGCC |
0.15 |
0.50 |
0.80 |
0.050 |
0.030 |
0.025 |
|
SGCD1 |
0.12 |
0.50 |
0.60 |
0.040 |
0.030 |
0.025 |
|
|
SGCD3 |
0.08 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
SGCD4 |
0.06 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
For Structure Japanese Standard |
SGC340 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.025 |
|
SGC400 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.150 |
|
|
SGC490 |
0.30 |
0.50 |
2.00 |
0.200 |
0.035 |
0.025 |
|
|
SGC510 |
0.30 |
0.50 |
2.50 |
0.200 |
0.035 |
0.025 |
|
|
For Structure AISI Standard |
S220GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
S250GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S280GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S320GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S350GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
|
|
S550GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
Mechanical Properties
|
Grade |
Yield Strength MPa≥ |
Tensile Strength MPa≥ |
Elongation A%≥ |
|
DX51D Z/ZM/AZ/AM |
240-380 |
270-500 |
22 |
|
DX52D Z/ZM/AZ/AM |
140-300 |
270-420 |
26 |
|
DX53D Z/ZM/AZ/AM |
140-260 |
270-380 |
30 |
|
DX54D Z/ZM/AZ/AM |
120-220 |
260-350 |
36 |
|
S220GD Z/ZM/AM |
220 |
300 |
20 |
|
S250GD Z/ZM/AZ/AM |
250 |
330 |
19 |
|
S280GD Z/ZM/AM |
280 |
360 |
18 |
|
S300GD A/AM |
300 |
380 |
18 |
|
S320GD Z/ZM/AM |
320 |
390 |
17 |
|
S350GD Z/ZM/AZ/AM |
350 |
420 |
16 |
|
S450GD A/AM |
450 |
480 |
15 |
|
S550GD Z/ZM/AZ/AM |
550 |
550 |
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